DISTORTION COMPENSATION FOR ROD PISTON BORE IN SUBSURFACE SAFETY VALVES

Piston bore distortions in a sub-surface safety valve are reduced or eliminated when valve body is subjected to high working pressures. In one embodiment, a piston is disposed in a sleeve that is disposed in a piston bore. The bore can distort but the sleeve within will not distort to the point of l...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	BANE, DARREN E, ANDERSON, DAVID Z, WAGNER, ALAN N, LAKE, GARY (BEN) B, BEALL, CLIFF
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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